| 松散堆积体工程边坡变形机理分析及支护对策研究 |
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| 引用本文： | 赵建军,巨能攀,涂国祥.松散堆积体工程边坡变形机理分析及支护对策研究[J].力学学报,2008,16(5):611-615. |
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| 作者姓名： | 赵建军 巨能攀 涂国祥 |
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| 作者单位： | 四川绵阳中国空气动力研究与发展中心总体技术部，621000 四川绵阳中国空气动力研究与发展中心总体技术部，621000 四川绵阳中国空气动力研究与发展中心总体技术部，621000 |
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| 摘 要： | 利用表面温度测量来反演热传导方程中的热源项是一类典型的热传导逆问题，在采用有
限体积法对三维非稳态热传导问题进行数值求解的基础上，将该热传导逆问题转化为优化问
题，建立了伴随方程法和共轭梯度法这两类反演算法. 采用这两类算法对一个典型算例的计
算结果表明：建立的两类反演算法是有效的，具有较好的抗噪性能. 此外，对反演算法
中计算收敛准则的选取进行了较深入的分析，结果表明，由于热传导逆问题的不适定性，优
化过程中目标函数值越小并不意味着反演结果与真值更为接近，可以通过设定合适的收敛准
则来模拟正则化项的作用，克服不适定性的影响.
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| 关 键 词： | 松散堆积体 边坡 变形机理 支护设计 |
| 收稿时间： | 2008-06-17 |
| 修稿时间： | 2008-09-11 |
DEFORMATIONMECHANISM AND SUPPORTINGMEASURES OFMANMADE SLOPES IN LOOSE DEPOSITS |
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| ZHAO Jianjun,JU Nengpan,TU Guoxiang.DEFORMATIONMECHANISM AND SUPPORTINGMEASURES OFMANMADE SLOPES IN LOOSE DEPOSITS[J].chinese journal of theoretical and applied mechanics,2008,16(5):611-615. |
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| Authors: | ZHAO Jianjun JU Nengpan TU Guoxiang |
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| Affiliation: | China Aerodynamics Research & Development Center, Mianyang 621000, China |
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| Abstract: | Th is paper is to study the selection of rat iona l slope rat io and slope deformat ionmechanism in loose de posits, w hich is the basis o f slope stability evaluat ion and supporting design. A m an- made slope comprising loose deposits in Southw estCh ina is taken as an example. B ased on study on the characteristics o f loose deposits, rationa l slope ratio is def ined according to the terrain. Tw o- dimensional fin ite e lementmethod is used to study deformation mechanism of the cut slope and to determ ine potent ial slide surface. A t las,t the suppo rt ing m easures are put for w ard according to the slope stability ana lysis. The slope has loose deposits of 70m in th ickness comprising a lluvia,l pro luv ia,l and debris f low deposits. The slope ratio is designed as 1: 0. 75 because the eng ineering flat is located at the low er part o f the slow slope, whose upper part is steeper. The resu lt of numerica l simu lation indicates that the cut slope area and the slope crest area generate tension stresses. The max imum shear stress concentrates at the low er part o f the slope, w h ich result in tension cracks at the slope top and shearing deformation at low er part o f the slope. W hen the shear ing deformation develops upw ards to the tension cracks, the slopew ou ld show an overa ll in stability. A ccording to the mechan ism analysis and result of slope stab ility evaluat ion, a synthetical supporting measure is pu t forw ard to con form the stab ility of the slope during ex cavation and operation periods. Them easure includes anchoring p ile, anchor cable fram e, anchor bo lt fram e, and dra inage. |
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| Keywords: | Loose deposits Cu t slope De formation mechanism Support ing design S lope stability |
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